If I believe in you, I will tell you, I cannot be brave. Those brave people are not happy, because it is, unfortunately, they brave.

如果我相信你。我会告诉你，我可以不勇敢吗。那些勇敢的人都未必幸福，因为是不幸让他们勇敢。

youdao

Unfortunately, it is not possible for UPS to create a test file with your actual billing data before you enrol for the service.

十分抱歉，在您登记该服务之前，UPS不能以您的实际缴款资料建立一个测试档案。

youdao

Unfortunately, I can not give you a CD, there is no way you heard it here so beautiful melodies, I can remember I have to share with you some of the lyrics.

很可惜，我不能给你们CD，也没办法在这里让大家听到它优美的旋律，我只能就我所记得歌词的部分来和大家分享。

youdao

You can brute force it and unfortunately, the so-called Caesar cipher is not very secure because if you assume, for our purposes in English alphabet with 26 characters, say all lowercase for all uppercase, my God, you only have to try like 24, 25, 26 possible rotations until you can figure out what his secret message is.

你可以强行解密但是不幸地是，所谓的凯撒密码不是很安全的,因为如果假设，对于我们的26个字符的字母表,指明所有的小写为大写，我的天，你只要试24，25次，26次就可以解答出,密文的内容。

哈佛公开课 - 计算机科学课程节选

Unfortunately as you pointed out it is NOT available at this point in the USA. So many of us will continue to travel outside the country.

FORBES: One Man's Reluctant Tour For Adult Stem Cells